About a year ago I committed a rookie mistake, I changed my permalink structure for a website that had hundreds of posts. I thought it was the best thing at the time, as our initial permalink structure was not the best for our content. Initially I thought search engines would eventually index the correct pages, but that never happened, and multiple 404 errors flooded my page logs. I scowered the Internet with hopes that someone would have an answer to my problem and was told by someone at Google that my best bet was to request removal of those pages and to re-index the correct URLs.